Car-truck side frame.



A. C. MURPHY.

CAR TRUCK SIDE FRAME.

APPLIGATION IILED JULY 10, 1912.

1,058,087. Patented Apr. 8; 1913.

COLUMBIA PLANDGRAPH C0,, WASHINGTON, D. c,

UNITED sTaTs ATENT orrion.

I ALBERT C. MURPHY, OF NEW, YORK, N. Y.

CAR-TRUCK SIDE FRAME.

To all whom it may concern:

Be it known that I, ALBERT C. MUR HY, a citizen of the United States, and a resident of the city, county, and State of New York, have invented a new and useful Improvement in Car-Truck Side Frames, of which the following is a specification.

This invention relates to car trucks.

It has for its principal objects to produce a light and durable car truck side frame structure which can be pressed from a single piece of sheet metal and has suflicient vertical resiliency to minimize crystallization of the metal, yet being relatively rigid longitudinally so as to effectively resist shocks transmitted in the latter direction; to avoid using separate structural members and thereby obviate the necessity for depending upon bolts and rivets for security; to produce a side frame structure which is adapted for all standard truck bolsters and spring planks; to provide for a rigid fastening for the spring plank so as to hold the side frames in parallel planes and prevent them from traveling the one forward to the other; to provide for the ready insertion of the bolster without removing any of the parts of the side frame; and to attain certain advantages as will hereinafter more fully appear.

The invention consists in the parts and in the arrangements and combinations of parts as hereinafter described and claimed.

In the accompanying drawing which forms part of this specification and wherein like symbols refer to like parts wherever they occur,Figure 1 is a side elevation of a car truck side frame illustrating an em bodiment of the invention; Fig. 2 is a view partly in top plan and partly in horizontal section on the line 22 of Fig. 1; Fig. 3 is an end view; and Fig. 4 is a vertical section on the line 44: of Fig. 1.

Referring to the structure shown in the drawing, the usual car wheels 1, journal boxes 2, and axles 8 are shown by dotted lines so as to illustrate the manner in which the truck frame may be mounted without confusion as to the parts essential to the present invention.

Specification of Letters Patent.

Application filed July 10, 1912.

Patented Apr. 8,1913.

Serial No. 708,537.

The side frame proper comprises a member t pressed into shape froma single sheet of metal. The upper compression chord 5 is flanged outwardly at its margin, as at 6.

This chord 5 extends continuously from one journal box to they other and it is arched at'its middle as is customary. The lower tension chord 7 is likewise flanged, as at 8, and extends continuously from end to end of the frame. This lower chord extends upward at an angle to the horizontal middle portion and merges with the end portions of the upper chord over the journal boxes.

The side frame is provided with a central opening 9 for the reception of the end portions of the truck bolster B and spring plank P, a fragment of the former being shown by dotted lines in Fig. 2 and the latter in Fig. 1. Other openings 10 are provided on opposite sides of the central opening 9 to lighten the structure and secure certain resiliency as will hereinafter more fully appear. Also to gain access to the interior parts of the truck frame and rigging.

The metal about the central opening 9 is flanged out-ward, as at 11; and the lower portion of the opening is somewhat narrower than the upper. This narrow portion is just wide enough to receive snugly a standard spring plank, which, as shown in the drawings, is of channel section. By riveting the web portion and side flanges of the channel member to the bot-tom and side flanges, respectively, about the opening 9, the truck frame structure is made rigid so that the two side frames are maintained in parallel planes and the one is held from moving forward to the other.

The cross dimension of the upper portion of the central opening 9 is ust a little more than the over-all cross dimension of the bolster between the tips of the guide lugs 7) thereof, so that the bolster may be slipped endwise through the opening. Column guide plates 12 are secured by rivets 13 to the inner faces of the vertical flanges 11 at opposite sides of the opening 9 near the top thereof. These column guide members are preferably provided with flanges 14 at their side margins so as to straddle and fit snugly against the edges of the flanges 11 and inner face of the side frame and thereby relieve the rivets 13 of shear and resist end thrust of the bolster. An unobstructed space 15 left at opposite sides of the opening 9 between the spring plank seat and lower ends of the column guide plates to permit the insertion of the bolster.

As shown, an H-shape filler member or bracket 16 is inserted between the horizontal flange l1 and middle portion of the tension chord flange 8. It may be riveted or otherwise fastened in place to secure stability to the support for the spring planlo Spools or sleeve-like strut members 17 are also provided between the portions of the flanges 6 and 8 above the journal boxes where the journal-box bolts 18 pass therethrough. A tie-bar 19 like those now in general use is also shown riveted to the under side of the middle port-ion of the tension chord flange 8, its end portions being secured to the under sides of the journal boxes 2 by the nuts on the lower ends of the journal box bolts 18.

To secure vertical resiliency to the side frame, the vertical portions of the web on opposite sides of the opening 9 are corrugated horizontally, as at 20, and additional corrugations 21 are provided inthe web where the upper compression chord 5 and lower tension chord 7 begin to merge. An gular corrugations 22 are also struck up from the flanges 11 at the sides of the opening 9 and from the vertical web port-ions between the corrugation 20. These angular corrugations 22 are provided primarily to brace the side flanges 11 against shocks from the truck bolster; but they also cooperate with the corrugations 20 and 21 to give the side frame a certain amount of vertical resiliency which absorbs shock and vibration to a considerable extent and thereby materially lessens the tendency for the metal to crystallize and break, as is the case where solid cast metal and absolutely rigid pressed metal structures are subjected to vibration and shock, and particularly car truck frame structures which are subjected to continuous vibration and rough usage.

Obviously, the side frame admits of considerable modification without departing from the invention. Therefore, I do not wish to be limited to the specific construction and arrangement shown.

What I claim is:

1. A pressed metal car truck side frame having flanged compression and tension chords and a central opening for the reception of the spring plank and truck bolster, the vertical web of said side frame being corrugated substantially horizontally.

2. A pressed metal car truck side frame formed from a single sheet, havingflanged compression and tension chords, said chords merging at the ends of the side frame, the web of the side frame between said compression and tension chords being corrugated substantially horizontally, said side frame also having a central opening, the metal being flanged around said opening.

3. A pressed metal car truck side frame having flanged compression and tension chords and a central opening for the reception of the spring plank and truck bolster, the side frame being flanged about the sides of said opening and having substantially horizontal corrugations.

4. A car truck side frame having marginal compression and tension chords, the body of the frame between said chords being orrugated substantially horizontally so as to give vertical resiliency thereto.

5. A pressed metal car truck side frame having flanged compression and tension chords, said chords merging near the ends of the side frame, said side frame having a central opening for the reception of the. spring plank and truck bolster, the web of the side frame being flanged around said opening and corrugated horizontally on opposite sides thereof and in the region where the compression and tension chords merge.

6. A pressed metal car truck side frame formed from a single sheet, having flanged compression and tension chords, said chords merging at the ends of the side frame, the web of the side frame between said compression and tension chords being corrugated substantially horizontally, said side frame also having a central opening, the metal being flanged around said opening, and strut members inserted between the flanges of the compression and tension chords where the latter are merged.

7 A pressed metal car truck side frame formed from a single sheet, having flanged compression and tension chords and a central opening, the metal around said opening being flanged, the vertical flanges at opposite sides of the opening and the adjacent web portion having merged substantially horizontal corrugations.

8. A pressed metal car truck side frame formed from a single sheet, having flanged compression and tension chords and a central opening, the metal around said opening being flanged, the vertical flanges at opposite sides of the opening and the adjacent web portion having merged substantially horizontal corrugations, and the web having additional substantially horizontal corrugations.

9. A car truck side frame having flanged upper compression and lower tension chords, the compression chord being arched and the ends of the tension chord extending upward and merging with the ends of the compression chord, the Vertical Web of the side stantially horizontally so as to give vertical frame having a central opening for the reresiliency thereto. 10 ception of the truck bolster and spring Signed at Montreal, Canada, this 3rd day plank and having substantially horizontal of July, 1912.

corrugations on opposite sides of said open- ALBERT C. MURPHY. ing. Witnesses 10. A car truck side frame having a ver- R0131. E. POWERs, tical body portion which is corrugated sub- W. W. HARWOOD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G." 

